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[Idea] Computer Chronicles: 35th Anniversary Edition
#25
And after that, some judicious sharpening. To demonstrate it, I used LimitedSharpen(), a plug-in script for AviSynth. I like the theory of it's design, to mitigate "haloing",  as explained by it's author:

Quote:Let's have a look at a simple transition from dark to bright, and what our standard sharpeners will do to it:

[Image: normal_sharpen.png]

The blue line represents the original edge, the dark side on the left, the bright side on the right, and in-between the gradient that builds "the edge". Red is (basically) the result of sharpen() or UnsharpMask(), pink is the result of XSharpen().
...
Shortly, LimitedSharpen() applies one out of three different sharpeners (two domain sharpeners or a windowed range sharpener) to the source, but will limit the oversharpening (either "hard" or "soft") IF it exceeds a defined "overshoot".

In reference to the graphs above, the script's results look like that (basically) :

[Image: Limited_sharpen.png]

(The proportions are not "real" - both graphs were constructed free-handed.)

As you see, LimitedSharpen always takes the enhanced edge steepyness from normal sharpening, but avoids oversharpening in the same way as XSharpen, as long as overshoot is kept at zero, and limiting mode 1 is used.
In many cases, this comes out really nice, and is sufficient.

I'm sure DaVinci Resolve must have a good sharpener (or a plug-in available for it) to do the similar thing. Anyway, here's what this one does (top - my color correction; bottom - sharpened, at default settings) . .

[Image: Computer_Chronicles_origi_tweaked_matched_sh.png]
Thanks given by:


Messages In This Thread
RE: Computer Chronicles: 35th Anniversary Edition - by BronzeTitan - 2017-08-18, 05:46 PM

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